{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STF16N50U","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STF16N50U","canonicalUrl":"https://icboms.com/stmicroelectronics/STF16N50U","factsUrl":"https://icboms.com/api/mcp/products/STF16N50U","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics UltraFASTmesh™ series, STF16N50U, N-Channel MOSFET, 500 V Vdss, 15 A Id, 520 mOhm Rds(on) at 10 V, 40 nC Qg, TO-220-3 Full Pack, Through Hole.","salesMarkdown":"## 500 V, 15 A N-channel MOSFET in a fully isolated TO-220FP The device is designed for hard-switching topologies in offline power supplies, flyback converters, PFC stages, and lighting ballasts where 500 V blocking capability and moderate conduction losses are required. The 500 V Vdss rating gives a comfortable derating margin for universal-input (85–265 VAC) offline converters, where the reflected voltage on the primary-side MOSFET typically peaks around 400–450 V after leakage-inductance spikes. Gate charge is 40 nC at 10 V, a moderate figure that a standard gate-driver IC or a simple discrete driver can switch without excessive cross-conduction losses. Input capacitance is 1950 pF at 25 V drain-source, which together with the gate charge gives a reasonable switching speed for frequencies up to about 100 kHz in a typical flyback or forward converter. ## Obsolete — what this means for procurement Buyers should evaluate a pin-compatible replacement or a functionally equivalent MOSFET from the same voltage and current class for new designs. The TO-220FP full-pack package is a through-hole, three-lead format with a fully molded back — no exposed metal tab. In a typical offline supply, the device is bolted to a heatsink with a screw through the mounting hole; thermal compound is still recommended between the package back and the heatsink surface.","metaTitle":"STF16N50U N-Channel MOSFET, 500 V, 15 A, TO-220FP, Obsolete","metaDescription":"STF16N50U N-Channel MOSFET from STMicroelectronics UltraFASTmesh™ series. 500 V Vdss, 15 A Id, 520 mOhm Rds(on) at 10 V. TO-220FP full-pack.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Discrete Semiconductors"],"specifications":{"Mfr":"STMicroelectronics","Series":"UltraFASTmesh™","Package":"Tube","FET Type":"N-Channel","Vgs (Max)":"±30V","Technology":"MOSFET (Metal Oxide)","FET Feature":"-","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Vgs(th) (Max) @ Id":"4.5V @ 100µA","Base Product Number":"STF16","Operating Temperature":"150°C (TJ)","Rds On (Max) @ Id, Vgs":"520mOhm @ 5A, 10V","Power Dissipation (Max)":"30W (Tc)","Supplier Device Package":"TO-220FP","Gate Charge (Qg) (Max) @ Vgs":"40 nC @ 10 V","Drain to Source Voltage (Vdss)":"500 V","Input Capacitance (Ciss) (Max) @ Vds":"1950 pF @ 25 V","Drive Voltage (Max Rds On, Min Rds On)":"10V","Current - Continuous Drain (Id) @ 25°C":"15A (Tc)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.4100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for STF16N50U?","answer":"No official replacement order code is listed by STMicroelectronics for the STF16N50U. For a functionally equivalent part, look for a 500 V, 15 A N-channel MOSFET in a TO-220FP package with similar Rds(on) and gate charge. The STF16N50M is a related variant in the same UltraFASTmesh™ family, but its datasheet should be checked for parametric differences before substitution. For new designs, consider current-production 500 V MOSFETs from ST's MDmesh™ series or equivalent offerings from Infineon, onsemi, or Vishay."},{"question":"What is the Rds(on) of STF16N50U?","answer":"The maximum on-resistance is 520 mOhm at 5 A drain current and 10 V gate drive. This is the value used for conduction loss calculations in the design."},{"question":"Where can I buy STF16N50U?","answer":"The STF16N50U is obsolete and not available through standard distribution. It is sourced through independent and surplus distribution channels. Submit an RFQ for current availability and pricing, which are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STF16N50U","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STF16N50U when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}